Smoke-consuming furnace



(No Model.)

J. L. PBSLIN.

`SMOKE GONSUMING FURNAGE. No. 348,863. Patented Sept. 7, 1886.

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UNITED STATES PATENT OEEICE.

JOHN LFVIS PESLIN, OF APPLETON, VISOONSIN.

SMOKE-CONSUMING FURNACE.

QPECIFICATION forming part of Letters Patent No. 348,863, datedSeptember 7, 1886.

Application filed May 14, 1F86. Serial No. 202,183. (No model.)

To all whoml it 11ml/ concern:

Be it known that I, JOHN LEwIs PEsLIN, of Appleton, in the county ofOutagamie and State of Visconsin, have invented a new and Improved Smoke-`Oonsuming Furnace, of which the following is a full, clear, and exactdescription. Y

My invention relates to the construction of a smoke and gas consumingfurnace wherein the main fires having been once started are fed bypartially-coked coal, the smoke and gas generated during this process ofpartial coking being delivered beneath and forced to pass through themain fire of the furnace.

Freni the peculiar construction and arrangement of my furnace I am ableto utilize every particle of heat-generating material entering into thecomposition of the coal, and consequently I am able to maintain my fireswithout contaminating the atmosphere with soot or disagreeable odors,and, owing to the perfect combustion which Iobtain the boilerflues arenot clogged or coated with soot, and consequently I am able to generatea greater amount of steam from a given amount of fuel than would bepossible in eases where the ilues were coated with soot, for, as will bereadily understood, sootbeing a non-conductor of heat will prevent Vtheheat passing through the fines from acting to the fullest extent as asteamgenerating agent.

Another decided advantage which I obtain by constructing my furnace inthe manner to be hereinafter described is that it never becomesnecessary to open the doors leading to the main combustion chamber, andeonsequently I avoid all sudden cooling of the boil er, and thereby notonly am I able to maintain a steady stcampressure, but I materiallydecrease the wear and tear upon the boiler.

Reference is to be had to the accompanying drawings, f orinin g a partof this specification, in which similar figures of reference indicatecorresponding parts in both the figures. Figure 1 is a front View of abattery ofboilers, the furnaces of which are constructed in accordancewith the terms of my invention, part of the front plate being brokenout; and Fig. 2 is a detail view illustrating the construe tion of thegrate cf the coking-chambcr.

Although I have illustrated my furnace as arranged in connection with abattery of boilers, I wish it to be distinctly understood that theprinciple is equally applicable to single boilers, and I also wish it tobe understood that the coking-ehamber, instead of being arranged at thesides or side of the boiler, could be arranged in front of it.

In the constructionillustrated, represents the boilers, of which thereare two in the battery.

Upon the outer side of each ofthe boilers I arrange a coking-chamber,11, that is divided from the main combustion-chamber by a wall orpartition, 12, which is made from blocks of fireclay that are formedwith apertures 2, through which there is passed a rod, 3, which isproperly mounted in the rear wall ofthe battery-casing and the frontplate of the same; or the entire wall 12 could be made of a single blockof fire-clay.

is the main combustion-chamber beneath the boiler, and 21 is theash-pit, the main grates 22 being arranged upon an incline, asindicated.

From the outer edge of the Inaingrate there is arranged adownwardly-extending partition or wall, 23, that is preferably made ofsheetiron, and which, after extending downward for some distance, iscarried toward the outer wall of the battery, and then runs upwardparallel with said outer wall, forming the flue 24, the material ofwhich the wall or apron 23 is made being supported by the rear wall ofthe furnace and the front plate.

The frame of the grate upon which the coal to be coked is placed isshown at 13, and is provided with trunnions 4, that are mounted inproper bearings that permit ot' the tilting of the frame to the positionin which it is shown in dotted lines on the right in the drawings. Theforward edge of the frame 13 abuts against the lower edge of thedividing wall or partition 12, and from the lower side ofthe grate thereis a downwardlyextending flange, (3, the outer face of which is formedin the arc of a circle that is concentric with the axes of the trunnionsupon which the grate is swuno. The circular face of this flange 6 restsclosely against the upper outer edge of the main grate 22.

The grate-bars 7, S, and 9 are each provided with dovetail projectionswhich fit within correspondingly-fbrnied recesses in the frame 13,

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and these grate-bars are arranged in series in the order named, the bars9, which are deeper than the bars 7 or 8, being farther removed from theinner edge of the frame 13 than are the bars 7'01'8 of the same series.The forward trunnion, 4, of the grate-frame 13 projects outward throughthe front plate of the furnace, and to this forwardly-projeeting endthere is fitted a lever-arm, 25.

Communication with the coking-chamber, the combustionchamber, theash-pit, and the air-space beneath the grate of the cokingchamber isestablished through the medium of doors that are mounted in the usualmanner upon the front plate of the furnace, as shown upon the left inthe drawings, the position of these doors being indicated by dottedlines upon the right ofthe drawings.

Between the two boilers there isa double coking-chamber, 40, providedwith partitionwalls 12, as in the case of the cokingchamber 11, and witha fine, 41, which leads to the ashpit beneath the.combustionchamber 20of each of the boilers shown. In case it should be necessary to let outthe fire in one of the com` bustion chambers, then communication betweenthe fiue 4l and the ash-pit of-the comluistion-chamber in which the firewas so drawn would be cut ofi1 through the medium of a damper, 42, thatis arranged directly beneath the center line of the flue 41, and somounted that, although it will normally stand in the position in whichitis shown in full lines in the drawings, it may be thrown to eitherofthe positions indicated by dotted lines.

In operation,the fires are kindled in the ordinary manner within thecombustion-chambers 20, and at the same time other fires are kindled inthe coking-chambers, the necessary draft to these coking-chambers beingobtained through openings leading into the air-chamber 17, that r:isformed by the wall or partition 23, the position of the opening upon theright of t-he furnace being indicated by dotted lines, while the openingupon the left is represented as being closed by a door,-` 43. As thegas, smoke, &c., is driven off from the coal it will pass in thedirection ofl the arrows shown in the drawings from the severalcoking-ehambers to the ash-pits beneath the combustion-chambers 20, andthence will pass through the burning material resting upon the maingrate-bars 22, and into the combustion-chambers proper, so that allcombustible and heat-generating matter will be consumed before reachingthe smoke-stack, which is arranged in the ordinary manner in connectionwith the combustion-chambers. After. the coal placed within theeoking-chambers has been practically eoked and deprived of itssmoke-producing and volatile heat-producing constituents the lever 25 isgrasped and thrown upward in the direction ofthe arrow, thus causing thegreater portion of the coke to fall upon the fire within the maincombustion-chamber, but owing to the peculiar arrangement of thegrate-bars carried by the frame 13 a sufficient quantity lright in thedrawings.

ofignited coal will be held upon the upwardlyextending side faces of thegrate-bars 9 to start the process of coking and partial combustion ofthe next supply of fresh coal that is placed within the coking-chamber.

In ease the natural draft of the furnace should prove to be insufficientto carry on the necessary coking process within the cokingchambers, Iemploy a jet of snperheated steam, which I obtain by means of a pipe,50, that leads from the steam-drum through the upper portion of the maincombustion-chamber, out through the front plate of the boiler, downwardin front of said plate, and finally is again carried through the frontplate and into the flue leading from the coking-chamber to the ash-pitbeneath the main combustionchamber, the pipe being carried inward in ahorizontal line and being located as indicated in the drawings. Thispipe is provided with a series of perforations, 5l, through which thesteam spurts out in the direction of the arrow shown in connection withthe pipe upon the Vhen the steam is not required,it is shut off by meansof a valve, 52, arranged as shown on the left in the drawings.

Now, although I have described my furnace as arranged in connection withavboiler,it will of course be understood that other forms of furnacecould be arranged in accordance with the terms of my invention, and itwill also be understood that the invention could be applied to theboilers of locomotive-engines as well as to stationary boilers.

Having thus described myinventiomwhat I claim as new, and desire tosecure by Letters Patent, is-

l. The herein-described method of consuming gases and smoke, whichconsists in generating said gases and smoke in a coking-chamber by meansof an auxiliary fire, eausing'the gases and smoke so generated to passby way of a flue to a pit beneath the fire of the maincombustion-chamber, and thence through the fire and into thecombustionchamber, substantially as described.

2. The herein-described method of burning coal, which consists inplacing the coal in a coking-chamber, generating thev gases and smokecontained therein and causing the gases so generated to pass through themain fire and into the main combustion-chamber, and in finally dumpingthe coke formed in the coking-chamber into the main combustion-chamber,substantially as described.

3. The herein-described method of burning coal, which consists instarting combustion in a main and an auxiliary chamber, carrying theproducts of combustion of the auxiliary chamber through the body of thefire in the main combustion-ehamber, continuing the operation until thefuel in the auxiliary chamber is partially coked, in then dumping thegreater portion of the fuel from the auxiliary chamber into the mainchamber, leaving only a few glowing coals, in then adding fresh fuel IOOto the auxiliary chamber, again driving off the gases and again dumpingthe greater portion of the mass, substantially as described.

4. In a furnace, the combination, with a main combustion-chamber, of acoking-cham ber, a ilne leading from the coking-chamber to a pointbeneath the grate of the main chamber7 and a dumping mechanism arrangedin connection with the grate of the cokingchamber, substantiallyl asdescribed.

5. In a furnace, the combination, with a main combustion-chamber, of acokingchamber and its grate formed with a downwardlyextending ilange, apartition arranged between the main combnstion-chamber and theeoking-ehamber, ash pits or chambers arranged in connection with themain combustion-chamber and the eoking-chamber and separated from eachother, and a flue leading JOHN LEWIS PESLIN.

fitnessesz GEO. C. JONES, W. J. ALLEN.

